@serracollector you have to pay full cost, so you can only reasonably get leyline if you have a lotus/LED in the bin too. there aren't currently many lists playing the power/fatestitcher and the leylines. it gets back bazaar if you haven't already made a land drop that turn. if you have a land drop free the upside of this is better, get back an LED and a bazaar, but if you have used your land drop it's probably worse(than titan). lotus/fatestitcher decks also don't have room for stuff like ichorid/unmask/force to the same degree so pitching is less relevant.

The loop would be; have a muldrotha in play and play a clone effect (dance of many, phantasmal image), the original dies to legend rule and you now have a new one that doesn't remember what has been played this turn. Cast lotus from the yard and then cast either another clone effect or an animate dead style enchantment to get another muldrotha and continue the loop.

At this point you can play all permanents out of your graveyard, notably good with walkers in the instance that you can get multiple of the same kind in graveyard (dack, daretti and both 3 cmc lilliana's come to mind)

I believe the card is worth considering, but I would think it goes more towards a worldgorger dragon/bomberman style deck than something like dredge. How good can a bomberman deck be with animate deads and clones? There is only so much space in a deck, so it definitely won't be easy to make properly.

If I'm understanding correctly, when Muldrotha hits play you're going to need at least 4 cards in your graveyard (Dance of Many + Dance of Many + Black Lotus + Something to kill with after you generate mana). This doesn't feel like it stacks up too well against Sun Titan, which just needs 2x Saheeli Rai. Sun Titan and Muldrotha are pretty comparable in terms of castability and value outside the combo, I might give the edge to the Titan for not being a legend.

As a combo I'm not seeing it, unless you happen to be playing a deck that's already running the support cards? Maybe Phantasmal Image has some use as a general control or value card? (You couldn't run Oath with it)

@shaman-ben I'm still pretty sure that's one dead slot worse than Sun Titan ... and Karmic Guide-based kills ... and Necrotic Ooze-based kills ... and Sutured Ghoul-based kills ... it's almost like you've never spent a huge amount of time looking through Gatherer trying to make a Cephalid Breakfast deck in vintage :P

Honestly, I don't think Combo Oath is where you want to be right now - you are essentially compounding the inconsistency of Oath with combo pieces without obvious gain. When Mentor was unrestricted with Gush and Probe, you often couldn't pass the turn back to the Mentor pilot or they could chain enough spells together to attack through Griselbrand. It's why Inferno Titan has risen to prominence after the restriction.

This card interests me outside of combo applications - you can recast Dack, Pernicious Deed, 3Ball, Null Rod, Lotus and replay Strip Mine each turn. Some people have tried value takes like this with Sun Titan while eschewing the Sun-Rai kill. It seems attractive as a castable sort of value creature similar to Titan, but possibly in better colors. The downside is that it's vulnerable to Pyroblast, which is not a good place to be right now. And it doesn't get around Grafdigger's Cage like other castable creatures.